Juniper JN0-104 Exam Practice Questions (P. 1)
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Question #1
In the show | compare rollback 49 command, what is the purpose of the | ?
- AThe | is used to represent an "either or" statement
- BThe | is a shortcut to redirect output from a command line to a file
- CThe | filters the output of the show command TMost Voted
- DThe | changes the command from an operational command to a configuration mode command
Correct Answer:
C
C

The pipe character "|" in Junos OS commands acts as a filter, processing command output for targeted analysis or comparison. Specifically, in "show | compare rollback 49," the pipe filters the output of the 'show' command to be used by the 'compare rollback 49' command, which contrasts the current configuration with a specific historical configuration indexed by 49. This functionality is crucial for examining specific changes or verifying configurations in Junos, enhancing operational efficiency by focusing on relevant data without altering the base command's mode.
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Question #2
What are two benefits of a modular operating system? (Choose two.)
- AEach module runs in its own protected memory spaceMost Voted
- BIt enables the independent restart of each module as necessaryMost Voted
- CA malfunction in one module causes a full system shutdown
- DIt enables CPU scheduling strictly using kernel system calls
Correct Answer:
AB
AB

A modular operating system offers enhanced stability and flexibility. Each module operates within its protected memory space, this not only improves security by isolating modules but also ensures that issues in one don’t spill over to others. Additionally, the ability to independently restart each module simplifies maintenance and troubleshooting by allowing specific issues to be addressed directly without impacting the entire system. This modular structure makes the system robust against failures and adaptive to changes, embodying a design that supports dynamic management and fault isolation efficiently.
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Question #3

Referring to the exhibit, you are unable to see any traffic coming on interface ge-0/0/0. What is causing this problem?
- AThe ge-0/0/0 interface is administratively down
- BThe ge-0/0/0 interface has flow control disabled
- CThe ge-0/0/0 interface s physical link is downMost Voted
- DThe ge-0/0/0 interface has the link-mode set to half-duplex
Correct Answer:
C
C
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Question #4
Which command should you use to check real-time statistics of all active interfaces?
- Auser@router> monitor interface trafficMost Voted
- Buser@router> show interface detail
- Cuser@router> show interface terse
- Duser@router> monitor traffic extensive
Correct Answer:
A
A

The command "monitor interface traffic" is specifically designed to display real-time statistics on all active interfaces, updating this data every second. This makes it an excellent tool for live monitoring, as it focuses solely on traffic data such as the number of packets, bytes, and any errors occurring on each interface. While other commands like "show interface detail" and "show interface terse" also provide interface data, they do not offer real-time or traffic-focused statistics. Moreover, "monitor traffic extensive" includes broader traffic information that goes beyond just interface stats, potentially complicating quick assessments of interface performance.
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Question #5
user@router> show interfaces | no-more
What happens when you filter the output of a command using the no-more parameter?
What happens when you filter the output of a command using the no-more parameter?
- AThe output is displayed in XML format
- BThe output is displayed with no page breaksMost Voted
- CThe last screen of information is displayed
- DThe number of lines in the output are displayed
Correct Answer:
B
B

Absolutely spot on, option B is the correct choice. Using the 'no-more' parameter in Junos OS command output helps to display all the data at once rather than pausing at each screenful as it usually would. This feature is incredibly handy when you need to view a long output without constant interruptions. It's perfect for quickly gaining a comprehensive view without the need to keep pressing a key to advance the output. Remember, it doesn't modify the data's format or offer partial views; it simply eliminates those pesky page breaks.
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